Harrow.



C. E. WHITE.

HARROW.

APPLIOATION FILED nu 29. 1908.

Patented Dec. 10, 1912.

UNITED sTATEs PATENT oEEIoE.

CHARLES E. WHITE, 0F MOLINE, ILLINOIS, ASSIGNOB T0 DEER-E IANBUB CQKP'ANY,

. A CORPORATION Ol' ILLINOIS.

HARROW.

Application led Kay 29, 1908. Serial No. 435,828.

of Illinois, have invented certain new and' useful Improvements in IIarrows, of which the followmg is a specification, reference being had therein to the accompanying drawmfr.

slhis invention relates to harrows which are adapted for the renovation of alfalfa, or other crops of a similar character.

In implements of this character use is made of disks with outwardly, extending spike teeth. These toothed disks or heads are arranged in gangs and roll over the ground in much the same manner as do the disks of the ordinary disk barrow, their action, however, being quite different.

rlhe object of my invention is to improve the construction of the heads and also the method o-f mounting the heads and' the scraper bars with which the heads are provided.

In the accompanying drawing, which illustrates a practical embodiment of my invention, Figure 1 is a rear elevation of the harrow, the right gang of tools being shown in section. Fig. 2 is a face View of one of the heads. Fig. 3 is a face view of the head disk, and Fig. 4. is a central sectional view of said disk.

The frame of the implement is preferably of the disk harrowtype in which two (gang frames are pivotally connected to the raft bars, and are provided with means to effect their angular adjustment in relation to the line of d-raft. Inasmuch as this type of frame is well known, I have shown in the spaced relation by spools 8, 9. The spacing spools 9 are spec1ally constructed to receive the bearing boxes 5, being formed vwith outturned anges 9'* between which and a central flange 5'3L of the boxes are mounted wooden bearing rings 5*. The bearing boxes are referably formed in two parts 5e and 5f, t e former having an up-standing extenslon to which the depending bar 4 is bolted.

The inner head carries a bumper 10 secured in position by the gang bolt in the usual way, and between the outer head and the nut of the gan bolt is mounted a flanged collar 11, designed to receive the lower end of one of the scraper bars 12, one of which is provided for each ofthe heads. These scraper bars are secured at their upper ends to the transverse bars 1 of the gang frames and at the lower ends are bent partially around the spacing spools 8, 9, flanges 8 being formed on the spools to maintain the scraper bars in position adjacent the disks. This construction is somewhat varied in the caseof the spacing spools 9 where the ends of the bearing boxes 5 serve to prevent dis-l placement of the scraper bars. Also, in the case of the outside scraper bars, the flanged collars 11 above referred to serve to hold the bars in position.

Referring now to the construction of the tools proper, it will be noted that each of the heads comprises a disk part 13, having a hub 14 with a square hole to receive the gang bolt. One face of the disk is plain but on the other face is formed a continuous circular flange 15 which serves as an abutment for the inner ends of the spike teeth 16, the latter being disposed between the laterally extendin lugs 17 which the disk carries at lts perip ery. Between the annular flange 15 and the lugs 17 the face of the disk is formed with an inclined or beveled groove or depression as indicated at 18, and the teeth 16 at their inner ends have beveled lateral extensions 16a designed to enter the said depression at 18. The teeth are secured in position by means of a ring 19 and bolts 20.

It will be seen that when the ring is clamped tightly against the sides of the teeth that the latter are held rigidly in posi-v inward against the Hang? 15 and hold them securely against play. hen the bolts have thus been loosened theA clamping ring 19 can, by using an ad'acent tooth as a pry or lever,

' be sprung su ciently to permit the withals drawal of the tooth in uestion.-

The surface of the disk intermediate lugs 17 is preferably inclined to the'disk axis as shown so as to glve the teeth a -sl'ight'outward cant. a l It will be understoodthat all of `the heads,` spacing spools andthe gang bolt of each gan rotate in unison, the whole system having caring supports in the'boxes 5.

What I claim is :-I

1. In an improvement of the class set forth, the combination with the headroomprising av disk having a circumferential seriesv of laterally extending lugs and 'a circular groove, a lurality of individually detachable teeth isposed between said lugs and extending radially from the disk and having a slight offset enga ement with the groove thereof, the oi'set belng in the direction of the axis of the disk, and common v means comprising a ringand bolts coperattending spike teeth disposed between t-he said lugs and adapted to be withdrawn endwise between said lugs, each tooth having a lateral extension to engage the groove of the disk, and means comprising a ring for clamping the teeth rigidly to the disk.

3. The spike toothed head comprising in combination, a disk having on one face a drawable endwise between the disk lugs and each tooth having a lateral extension to engage the grooveofthe disk, and means comprising a ring for clamping the teeth rigidly to the disk.

'4. The spike toothed head' comprising in combination a disk having on one -face a circular series of regularly spaced `lu s and a circular groove concentric with sai lugs and having a inclined or beveled side, a series of individually detachable spike teeth disposed between said lugs and extending from the periphery of the disk, each tooth having a beveled lateral extension engaging the beveled side of the groove of the disk, and means for clamping the teeth rigidly to the disk.

5. The spike toothed head comprising in combination, a disk having on one face a circular flange or rib, a circular groove outside said iange having a beveled or inclined side facing the iange, and a circular series of regularly spaced lugs, a series of individually detachable spike teeth disposed between said lugs with their inner ends abuttin the said circular ange and their outer en s extendin from the periphery of the disk, each toot having a beveled lateral extension to engage the groove of the disk, and means for clamping the teeth rigidly against the disk.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES E. WHITE. Witnesses:

N. A. PETERSON, J. V. LoonHART. 

